//--------------------------------------------------------------------------
//	Copyright (c) 1998-2004, Drew Davidson and Luke Blanshard
//  All rights reserved.
//
//	Redistribution and use in source and binary forms, with or without
//  modification, are permitted provided that the following conditions are
//  met:
//
//	Redistributions of source code must retain the above copyright notice,
//  this list of conditions and the following disclaimer.
//	Redistributions in binary form must reproduce the above copyright
//  notice, this list of conditions and the following disclaimer in the
//  documentation and/or other materials provided with the distribution.
//	Neither the name of the Drew Davidson nor the names of its contributors
//  may be used to endorse or promote products derived from this software
//  without specific prior written permission.
//
//	THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
//  "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
//  LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
//  FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
//  COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
//  INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
//  BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
//  OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
//  AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
//  OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF
//  THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH
//  DAMAGE.
//--------------------------------------------------------------------------
package com.ishitong.freesql.ognl;

import java.util.Map;

/**
 * Implementation of PropertyAccessor that sets and gets properties by storing
 * and looking up values in Maps.
 * 
 * @author Luke Blanshard (blanshlu@netscape.net)
 * @author Drew Davidson (drew@ognl.org)
 */
public class MapPropertyAccessor implements PropertyAccessor
{
	public Object getProperty(Map context, Object target, Object name) throws OgnlException
	{
		Object result;
		Map map = (Map) target;
		Node currentNode = ((OgnlContext) context).getCurrentNode().jjtGetParent();
		boolean indexedAccess = false;

		if (currentNode == null)
		{
			throw new OgnlException("node is null for '" + name + "'");
		}
		if (!(currentNode instanceof ASTProperty))
		{
			currentNode = currentNode.jjtGetParent();
		}
		if (currentNode instanceof ASTProperty)
		{
			indexedAccess = ((ASTProperty) currentNode).isIndexedAccess();
		}
		if ((name instanceof String) && !indexedAccess)
		{
			if (name.equals("size"))
			{
				result = new Integer(map.size());
			} else
			{
				if (name.equals("keys"))
				{
					result = map.keySet();
				} else
				{
					if (name.equals("values"))
					{
						result = map.values();
					} else
					{
						if (name.equals("isEmpty"))
						{
							result = map.isEmpty() ? Boolean.TRUE : Boolean.FALSE;
						} else
						{
							result = map.get(name);
						}
					}
				}
			}
		} else
		{
			result = map.get(name);
		}
		return result;
	}

	public void setProperty(Map context, Object target, Object name, Object value) throws OgnlException
	{
		Map map = (Map) target;
		map.put(name, value);
	}
}
